HAYNES® 214

HAYNES® 214

HAYNES® 214 is a nickel-chromium-aluminum-iron alloy, designed to provide the optimum in high-temperature oxidation resistance for a wrought austenitic material, while at the same time allowing for conventional forming and joining. Intended principally for use at temperatures of 1750°F (955°C) and above, alloy 214 exhibits resistance to oxidation that far exceeds virtually all conventional heat-resistant wrought alloys at these temperatures. This is attributable to the formation of a tightly adherent Al2O3-type protective oxide scale, which forms in preference to chromium oxide scales at these high temperatures. At temperatures below 1750°F (955°C), alloy 214 develops an oxide scale which is a mixture of chromium and aluminum oxides. This mixed scale is somewhat less protective, but still affords alloy 214 oxidation resistance equal to the best nickel-base alloys.

The higher temperature Al2O3-type scale which alloy 214 forms also provides the alloy with excellent resistance to carburization, nitriding and corrosion in chlorine-bearing oxidizing environments.

Applications

HAYNES® 214 combines properties which make it very suitable for service in relatively low-stress, high temperature oxidizing environments, where the utmost in resistance to oxidation or scale exfoliation is needed. Its resistance to such environments persists to temperatures as high as 2400°F (1315°C), although strength limitations may apply. Applications can include “Clean Firing” uses such as mesh belts, trays and fixtures for firing of pottery and fine china, and the heat treatment of electronic devices and technical grade ceramics.

In the gas turbine industry, alloy 214 is used for foil construction honeycomb seals, combustor splash plates, and other static oxidation – limited parts. The automotive industry has applications for alloy 214 in catalytic converter internals, and it is used as a burner cup material in auxiliary heaters for military vehicles.

In the industrial heating market, alloy 214 is used for highly specialized applications such as refractory anchors, furnace flame hoods, and rotary calciners for processing chloride compounds. It is also used for parts in high temperature chlorine-contaminated environments, such as hospital waste incinerator internals.

Specifications:

• DIN# 17744 No.2.4646